A feasible method for the composition analysis and chemical remediation of clogging matter in subsurface flow constructed wetlands
Yu Zheng,
Yuyang Song,
Rongshe Zhang,
Nan Zhang,
Mohomed Salah,
Siyi Cheng,
Yuanyuan Li,
Qian Wang,
Chenguang Li,
Fengmin Li
Affiliations
Yu Zheng
Institute of Coastal Environmental Pollution Control, Sanya Oceanographic Institution, College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Marine Environment and Ecology, Ocean University of China, Qingdao, 266100, China
Yuyang Song
Institute of Coastal Environmental Pollution Control, Sanya Oceanographic Institution, College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Marine Environment and Ecology, Ocean University of China, Qingdao, 266100, China
Rongshe Zhang
College of Fundamental Courses Teaching, Zhejiang Industry Polytechnic College, Shaoxing, 312099, China
Nan Zhang
Institute of Coastal Environmental Pollution Control, Sanya Oceanographic Institution, College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Marine Environment and Ecology, Ocean University of China, Qingdao, 266100, China
Mohomed Salah
Institute of Coastal Environmental Pollution Control, Sanya Oceanographic Institution, College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Marine Environment and Ecology, Ocean University of China, Qingdao, 266100, China
Siyi Cheng
Institute of Coastal Environmental Pollution Control, Sanya Oceanographic Institution, College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Marine Environment and Ecology, Ocean University of China, Qingdao, 266100, China
Yuanyuan Li
Institute of Coastal Environmental Pollution Control, Sanya Oceanographic Institution, College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Marine Environment and Ecology, Ocean University of China, Qingdao, 266100, China
Qian Wang
Institute of Coastal Environmental Pollution Control, Sanya Oceanographic Institution, College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Marine Environment and Ecology, Ocean University of China, Qingdao, 266100, China; Corresponding author. Institute of Coastal Environmental Pollution Control, College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Marine Environment and Ecology, Ocean University of China, Qingdao, 266100, China.
Chenguang Li
Institute of Coastal Environmental Pollution Control, Sanya Oceanographic Institution, College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Marine Environment and Ecology, Ocean University of China, Qingdao, 266100, China
Fengmin Li
Institute of Coastal Environmental Pollution Control, Sanya Oceanographic Institution, College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Marine Environment and Ecology, Ocean University of China, Qingdao, 266100, China; Laoshan Llaboratory, Qingdao, 266237, China; Corresponding author. Institute of Coastal Environmental Pollution Control, Sanya Oceanographic Institution, College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Marine Environment and Ecology, Ocean University of China, Qingdao, 266100, China.
The problem of clogging, especially biological clogging, makes the long-term operation of subsurface flow constructed wetlands challenging. This study focused on the two subsurface flow constructed wetlands receiving reclaimed water near the Tuhai River of Shandong Province, aiming to provide a feasible method for the composition analysis and chemical remediation by H2O2 solution of clogging matter. The compositions and distributions of clogging matter in these two wetlands were analyzed, and the effects of H2O2 solutions with different mass fractions on proteins, polysaccharides, nucleic acids, and humic acids in the organic clogging components were studied. The two case studies indicated that the contents of clogging matter in the two subsurface flow constructed wetlands varied greatly due to the operation time and operation mode, and the proportion of inorganic components was higher than that of organic components. The organic components of the clogging matter were mainly proteins and humic acids, with very small amounts of polysaccharides and nucleic acids. In addition, the H2O2 solution with a mass fraction of 10% had a good removal effect on proteins and humic acids in the wetland substrates, which also could increase the permeability coefficient of the substrates without causing a large negative impact on the temperature and pH value of the wetland systems. This article proposed a simple, economical, environmentally friendly method for analyzing and remediating biological clogging of subsurface flow constructed wetlands, which was expected to be widely used in situ remediation of clogging matter.
